/* 这是暴露出去的注释  */
//这是见不得人的注释

* {
	margin: 0;
	padding: 0;
}
#wrap {
	position: relative;
	width: 300px;
	height: 400px;
	border: 1px solid;
	margin: 0 auto;
	.inner {
		position: absolute;
		left: 0;
		right: 0;
		top: 0;
		bottom: 0;
		margin: auto;
		background: pink;
		height: 100px;
		width: 100px;
	}
}
